[web] fix problem with clicking when EV2 open

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30789 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3929 code style

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30790 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3929 better fix (hopefully) for null pointer on "draw as dropdown list"

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30794 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e